Fluid flow guide element and fluid flow apparatus equipped...

Details Fluid flow guide element and fluid flow apparatus equipped... Fluid flow guide element and fluid flow apparatus equipped...

2005-06-08

2008-07-15

Kershteyn, Igor (Department: 3745)

Rotary kinetic fluid motors or pumps

Runner has spirally arranged blade or fluid passage

C415S076000, C415S119000, C415S212100, C060S262000

Reexamination Certificate

active

07399155

ABSTRACT:
A fluid flow guide element (1) constructed, for example, as a diffuser having an inlet opening (2) and an outlet opening (3) whose respective cross-sectional areas differ from one another. Corresponding to the exterior view shown inFIG. 1, the inside wall surface (4) of the fluid flow guide element (1) is provided with spirally arranged recesses (5) and elevations (6) having an inclination (7) relative to a longitudinal axis (8) of the guide element (1). The recesses (5) and/or elevations (6) have a width that increases or decreases steadily between the inlet opening (2) and the outlet opening (3). This facilitates efficient operation of a fluid flow guide element (1) which simultaneously has both a large opening angle and a reduced design length by achieving a more uniform flow or flow profile due to the spiral arrangement of the recesses (5) and elevations (6).

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